From owner-freebsd-hardware Sat Sep 20 11:16:56 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id LAA19873 for hardware-outgoing; Sat, 20 Sep 1997 11:16:56 -0700 (PDT) Received: from peeper.my.domain ([208.128.8.69]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id LAA19866 for ; Sat, 20 Sep 1997 11:16:51 -0700 (PDT) Received: (from tom@localhost) by peeper.my.domain (8.8.7/8.7.3) id NAA05399; Sat, 20 Sep 1997 13:16:34 -0500 (CDT) Message-ID: <19970920131634.08085@my.domain> Date: Sat, 20 Sep 1997 13:16:34 -0500 From: Tom Jackson To: freebsd-hardware@FreeBSD.ORG Subject: Opinions please Was: Micropolis Runs Too HOT! References: <199709132341.NAA23393@pegasus.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.81e In-Reply-To: <199709132341.NAA23393@pegasus.com>; from Richard Foulk on Sat, Sep 13, 1997 at 01:41:23PM -1000 Sender: owner-freebsd-hardware@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk In my previous post I disCussed the heating situation with this 7200rpm scsi Micropolis drive. I now have two 4-1/2in cooling fans on the midi case, one blowing over the Mic located in two 5-1/4 in bays and one sucking out at the back of the case. Although I have return approval for a Fujitsu M2954S, many claim it will run just hot as the Micropolis. I have run iozone on all of my drives trying to decide if I should exchange. Although the Mic seems to write at a good rate the read specs don't look good at all. Would anyone with good knowledge of this please comment. I need to decide soon. iozone single results: --------------------------------------------------------- In the three runs, done separately, the disk cache sized to 11 megabytes. sd0 is a Micropolis 4421 2.1gb 5400rpm scsi, sd1 is a Micropolis 4345 4.5gb 7200rpm scsi, and sd2 is a Fujitsu M1606sau 1.08gb 5400rpm scsi. IOZONE: Performance Test of Sequential File I/O -- V2.01 (10/21/94) By Bill Norcott Operating System: FreeBSD 2.x -- using fsync() Send comments to: b_norcott@xway.com IOZONE writes a 44 Megabyte sequential file consisting of 5632 records which are each 8192 bytes in length. It then reads the file. It prints the bytes-per-second rate at which the computer can read and write files. Writing the 44 Megabyte file, '/usr/ports/iozone.tmp'...11.265625 seconds Reading the file...7.914062 seconds on sd0 IOZONE performance measurements: 4095409 bytes/second for writing the file 5829792 bytes/second for reading the file <--- Writing the 44 Megabyte file, '/usr/iozone.tmp'...6.625000 seconds Reading the file...6.257812 seconds on sd1 IOZONE performance measurements: 6964127 bytes/second for writing the file 7372759 bytes/second for reading the file <--- Writing the 44 Megabyte file, '/mnt1/iozone.tmp'...6.335938 seconds Reading the file...5.953125 seconds on sd2 IOZONE performance measurements: 7281849 bytes/second for writing the file 7750105 bytes/second for reading the file ----------------------------------------------------------- iozone concurrent results: Concurrent run to all three drives. Disk cache sized itself to 11mb. IOZONE: Performance Test of Sequential File I/O -- V2.01 (10/21/94) By Bill Norcott Operating System: FreeBSD 2.x -- using fsync() Send comments to: b_norcott@xway.com IOZONE writes a 44 Megabyte sequential file consisting of 5632 records which are each 8192 bytes in length. It then reads the file. It prints the bytes-per-second rate at which the computer can read and write files. Writing the 44 Megabyte file, '/usr/ports/iozone.tmp'...11.250000 seconds Reading the file...7.453125 seconds on sd0 (MC4421) IOZONE performance measurements: 4101097 bytes/second for writing the file 6190335 bytes/second for reading the file <--- Writing the 44 Megabyte file, '/usr/iozone.tmp'...6.585938 seconds Reading the file...6.304688 seconds on sd1 (MC4345NS) IOZONE performance measurements: 7005433 bytes/second for writing the file 7317943 bytes/second for reading the file <--- Writing the 44 Megabyte file, '/mnt1/iozone.tmp'...6.359375 seconds Reading the file...5.867188 seconds on sd2 (Fuj M1606S) IOZONE performance measurements: 7255012 bytes/second for writing the file 7863621 bytes/second for reading the file I can't tell if this bad performance or the disk might be damaged Tom ---